overscroll-event-fired-to-document.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /dom/events/scrolling/overscroll-event-fired-to-document.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-actions.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

<script src="scroll_support.js"></script>

<style>

#targetDiv {

  width: 200px;

  height: 200px;

  overflow: scroll;

#innerDiv {

  width: 400px;

  height: 400px;

</style>

<body style="margin:0" onload=runTest()>

<div id="targetDiv">

  <div id="innerDiv">

  </div>

</div>

</body>

<script>

var target_div = document.getElementById('targetDiv');

var overscrolled_x_delta = 0;

var overscrolled_y_delta = 0;

function onOverscroll(event) {

  assert_false(event.cancelable);

  // overscroll events are bubbled when the target node is document.

  assert_true(event.bubbles);

  overscrolled_x_delta = event.deltaX;

  overscrolled_y_delta = event.deltaY;

document.addEventListener("overscroll", onOverscroll);

function runTest() {

  promise_test (async (t) => {

    // Make sure that no overscroll event is sent to target_div.

    target_div.addEventListener("overscroll",

        t.unreached_func("target_div got unexpected overscroll event."));

    await waitForCompositorCommit();

    // Scroll up on target div and wait for the doc to get overscroll event.

    await touchScrollInTarget(300, target_div, 'up');

    await waitFor(() => { return overscrolled_y_delta < 0; },

        'Document did not receive overscroll event after scroll up on target.');

    assert_equals(target_div.scrollTop, 0);

    // Scroll left on target div and wait for the doc to get overscroll event.

    await touchScrollInTarget(300, target_div, 'left');

    await waitFor(() => { return overscrolled_x_delta < 0; },

        'Document did not receive overscroll event after scroll left on target.');

    assert_equals(target_div.scrollLeft, 0);

  }, 'Tests that the document gets overscroll event when no element scrolls ' +

      'after touch scrolling.');

</script>